tofsee | 8ef97516f5ec3db0157fd16d7c796da6431f8866b570f1e0772c5fb528b00722

General

Target

2025-02-02_842adcbd949a60af182d959ae963092f_mafia.exe
Size

12.8MB
MD5

842adcbd949a60af182d959ae963092f
SHA1

629699f75e2bf5107b6cba3fc93a9a2e9862cb66
SHA256

8ef97516f5ec3db0157fd16d7c796da6431f8866b570f1e0772c5fb528b00722
SHA512

be6707d80b2e66670c9653bd8ef0a647d5e89720c3e9411a4ef54b0c9cd4bc5c6f0bb5211d9aaef56f00f4a0dfa429ade95efa600f3d43910e9d11c6df84e83b
SSDEEP

24576:S6WdLQkyQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQf:bWdLQk

Score

10^/10

tofsee defense_evasion discovery execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

lazystax.ru

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
Tofsee family
tofsee
Creates new service(s) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002

Modifies Windows Firewall 2 TTPs 1 IoCs

defense_evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
3048	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\cxnurdtr\ImagePath = "C:\\Windows\\SysWOW64\\cxnurdtr\\rqegursk.exe"	svchost.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2436272344-4274332273-444425594-1000\Control Panel\International\Geo\Nation	2025-02-02_842adcbd949a60af182d959ae963092f_mafia.exe

Deletes itself 1 IoCs

pid	Process
4136	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2132	rqegursk.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2132 set thread context of 4136	2132	rqegursk.exe	102

Launches sc.exe 3 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
1696	sc.exe
3216	sc.exe
4100	sc.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

persistence privilege_escalation

Netsh Helper DLL

T1546.007

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
2356	864	WerFault.exe	82
2632	2132	WerFault.exe	96

System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rqegursk.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2025-02-02_842adcbd949a60af182d959ae963092f_mafia.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 864 wrote to memory of 1948	864	2025-02-02_842adcbd949a60af182d959ae963092f_mafia.exe	86
PID 864 wrote to memory of 1948	864	2025-02-02_842adcbd949a60af182d959ae963092f_mafia.exe	86
PID 864 wrote to memory of 1948	864	2025-02-02_842adcbd949a60af182d959ae963092f_mafia.exe	86
PID 864 wrote to memory of 4040	864	2025-02-02_842adcbd949a60af182d959ae963092f_mafia.exe	88
PID 864 wrote to memory of 4040	864	2025-02-02_842adcbd949a60af182d959ae963092f_mafia.exe	88
PID 864 wrote to memory of 4040	864	2025-02-02_842adcbd949a60af182d959ae963092f_mafia.exe	88
PID 864 wrote to memory of 3216	864	2025-02-02_842adcbd949a60af182d959ae963092f_mafia.exe	90
PID 864 wrote to memory of 3216	864	2025-02-02_842adcbd949a60af182d959ae963092f_mafia.exe	90
PID 864 wrote to memory of 3216	864	2025-02-02_842adcbd949a60af182d959ae963092f_mafia.exe	90
PID 864 wrote to memory of 4100	864	2025-02-02_842adcbd949a60af182d959ae963092f_mafia.exe	92
PID 864 wrote to memory of 4100	864	2025-02-02_842adcbd949a60af182d959ae963092f_mafia.exe	92
PID 864 wrote to memory of 4100	864	2025-02-02_842adcbd949a60af182d959ae963092f_mafia.exe	92
PID 864 wrote to memory of 1696	864	2025-02-02_842adcbd949a60af182d959ae963092f_mafia.exe	94
PID 864 wrote to memory of 1696	864	2025-02-02_842adcbd949a60af182d959ae963092f_mafia.exe	94
PID 864 wrote to memory of 1696	864	2025-02-02_842adcbd949a60af182d959ae963092f_mafia.exe	94
PID 864 wrote to memory of 3048	864	2025-02-02_842adcbd949a60af182d959ae963092f_mafia.exe	97
PID 864 wrote to memory of 3048	864	2025-02-02_842adcbd949a60af182d959ae963092f_mafia.exe	97
PID 864 wrote to memory of 3048	864	2025-02-02_842adcbd949a60af182d959ae963092f_mafia.exe	97
PID 2132 wrote to memory of 4136	2132	rqegursk.exe	102
PID 2132 wrote to memory of 4136	2132	rqegursk.exe	102
PID 2132 wrote to memory of 4136	2132	rqegursk.exe	102
PID 2132 wrote to memory of 4136	2132	rqegursk.exe	102
PID 2132 wrote to memory of 4136	2132	rqegursk.exe	102

C:\Users\Admin\AppData\Local\Temp\2025-02-02_842adcbd949a60af182d959ae963092f_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-02-02_842adcbd949a60af182d959ae963092f_mafia.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:864
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\cxnurdtr\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1948
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\rqegursk.exe" C:\Windows\SysWOW64\cxnurdtr\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4040
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create cxnurdtr binPath= "C:\Windows\SysWOW64\cxnurdtr\rqegursk.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-02-02_842adcbd949a60af182d959ae963092f_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3216
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description cxnurdtr "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4100
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start cxnurdtr
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1696
- C:\Windows\SysWOW64\netsh.exe
  "C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
  2⤵
  - Modifies Windows Firewall
  - Event Triggered Execution: Netsh Helper DLL
  - System Location Discovery: System Language Discovery
  PID:3048
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 864 -s 1220
  2⤵
  - Program crash
  PID:2356

C:\Windows\SysWOW64\cxnurdtr\rqegursk.exe
C:\Windows\SysWOW64\cxnurdtr\rqegursk.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-02-02_842adcbd949a60af182d959ae963092f_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2132
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4136
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2132 -s 512
  2⤵
  - Program crash
  PID:2632

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 864 -ip 864
1⤵
PID:2216

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 504 -p 2132 -ip 2132
1⤵
PID:3708

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

1

T1569

Service Execution

1

T1569.002

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Defense Evasion

Impair Defenses

1

T1562

Disable or Modify System Firewall

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\rqegursk.exe

Filesize
11.3MB

MD5
a14b42eedb113a600ad2be6e7a063bb1

SHA1
59bd424d389d3559e6077dbb3b5e2762d50349cb

SHA256
fa3b4ae19ad727fa568988e5a95847c092ecba7d2682f6ef7ab19147c626bb10

SHA512
ae1fe749f729e903eabdf1045c43f10fde956d1592a041aa1e77bbc7339aec6ad1abc1bf8c7565004948a5d5c9bdab99315a13825a6879b85777e77d09213ff9

Download Submit
memory/864-7-0x0000000000400000-0x000000000044F000-memory.dmp

Filesize
316KB

Download
memory/864-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/864-2-0x0000000000680000-0x0000000000693000-memory.dmp

Filesize
76KB

Download
memory/864-8-0x0000000000680000-0x0000000000693000-memory.dmp

Filesize
76KB

Download
memory/864-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/864-1-0x00000000006A0000-0x00000000007A0000-memory.dmp

Filesize
1024KB

Download
memory/2132-11-0x0000000000400000-0x000000000044F000-memory.dmp

Filesize
316KB

Download
memory/2132-12-0x0000000000400000-0x000000000044F000-memory.dmp

Filesize
316KB

Download
memory/2132-13-0x0000000000400000-0x000000000044F000-memory.dmp

Filesize
316KB

Download
memory/2132-18-0x0000000000400000-0x000000000044F000-memory.dmp

Filesize
316KB

Download
memory/4136-14-0x00000000007A0000-0x00000000007B5000-memory.dmp

Filesize
84KB

Download
memory/4136-16-0x00000000007A0000-0x00000000007B5000-memory.dmp

Filesize
84KB

Download
memory/4136-17-0x00000000007A0000-0x00000000007B5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads